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Compact single-pole circuit breaker with black toggle and grey body

SQUARE D

SQUARE D QOU130 Miniature Circuit Breaker 30A 1 Pole 120/240V AC

SKU CH-1VW7-BNW91

30 A single-pole breaker rated 120/240 V AC with 10 kA interrupting capacity for QO load centres

  • 30 A single-pole protection for 120/240 V AC circuits
  • 10 kA interrupting rating handles high fault currents
  • Reversible slotted box lug simplifies line and load wiring
  • Surface or DIN-rail mounting fits QO panelboards
  • 48 V DC rating adds low-voltage versatility

QO Series 30 A Miniature Breaker

This Square D QOU130 is a single-pole miniature circuit breaker rated 30 A for 120/240 V AC systems. It fits QO series load centres and mounts on DIN rail or surface hardware. The toggle actuator provides clear on/off indication for residential and light-commercial panels. It is not suited for three-phase distribution or DC circuits above 48 V.

10 kA Interrupting Capacity Under Load

The breaker carries a maximum AIR rating of 10 kA at 120/240 V AC, meaning it can safely interrupt heavy fault currents without contact welding. Thermal-magnetic trip elements respond to sustained overloads and short circuits alike, maintaining protection during extended demand. The 100 A frame size ensures consistent performance inside compatible QO panelboards.

Reversible Slotted Box Lug Terminals

Line and load connections use reversible slotted box lugs that accept standard conductors without special tools. The toggle snaps onto DIN rail or surface brackets, reducing mounting time inside crowded enclosures. Mis-wiring the reversible lugs or exceeding the 48 V DC limit are the most common installation errors.

How it compares

Measured against everything we stock in Breakers & Circuit Protection, at today’s prices. Recalculated every night.

Price $17.99
Cheaper than about 82% of the 1,135 comparable items (median $54.99).

Specifications

Product
Brand nameSQUARE D

Questions about this item

Does the QOU130 run hot or make noise when it carries 30 A all day?

The breaker has no fan or moving parts beyond the toggle, so it produces no audible noise and only normal warmth at its rated 30 A load.

What panelboard or mounting hardware must I already have to install this QOU130?

It fits QO-series panelboards or load centres and mounts on a standard DIN rail or surface with the reversible slotted box lugs supplied.

Will this 10 kA breaker coordinate with the older 100 A QO frame breakers still in my panel?

Yes, the QOU130 shares the 100 A frame size and 10 kA interrupting rating, so it works alongside existing QO breakers in the same panel.

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